This explains it visually why I choose my pressures like this, same car, same setup, same day. The pic sitting in the pit lane is 20-22psi cold (overcast), the cornering pic is around 26-28psi (sunny with higher track temp). The outside front tire is folding under and pushing the camber from -2.75 static to probably +1 at max grip (this corner is 4th gear at about 140km/h). You can see how much sidewall deflection there is between the 2 pictures. Had my cold pressure been +30psi the tires would have looked more like the cornering pic, at 40 psi there would be virtually 0 sidewall deflection and I already would've had to back off because the tread compound would be maxed out and without any sidewall flex to give it that extra 10% grip. Also, the inside front tire that doesn't account for much more than about 10% of the total traction here would've had probably 50% less contact patch at 40psi then at 26-28psi.
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